We present an original way to obtain reconfigurable microwave devices, filled with a polymer dispersed liquid crystal (PDLC). We study the dielectric parameters of the material in the microwave range, using an original cell. Then, we manufacture a microwave tunable device using the PDLC. The purpose of our work is to cancel the polymer alignment layer used in microwave devices filled with pure liquid crystals. Actually, the difference in thickness between metallic parts and non-metallic parts of some specific microwave devices do not allow this polymer alignment layer deposit.